kaykay

I have a veiled chameleon. My friend also has one but she keeps it in a glass tank. The tank is really big but the problem is ventilation. it pretty cold where my friend lives so she says that is why she has a glass tank. she says the pet store told her she wouldnt be able to keep it warm enough and humid enough in a screen cage. she has a screen top and she keeps a fan going in her room. her cham is perfectly healthy tho. i have told her to get a screen cage but she says her parents wouldnt buy her another cage seeing as they bought this one. i dont know what to do becuase i realy like her cham and i kno she does too. any advice would be greatly apreciated. thanks